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प्रश्न
Explain the fact that in alkyl aryl ethers, the alkoxy group is ring activating and ortho/para directing towards electrophilic aromatic substitution.
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उत्तर
- Resonance structures of alkyl aryl ethers are as follows:
- The +R effect of −OR the group results in increased electron density at the para- and two ortho positions.
Hence, the alkoxy group in aromatic ether is a ring activating and ortho/para-directing group towards electrophilic aromatic substitution.
संबंधित प्रश्न
Anisole on heating with concentrated HI gives ______.
Write chemical equation of acetyl chloride with ethanol
Write the preparation of ethanol from methyl magnesium iodide.
Write the reaction between ethanol and acetic anhydride.
What are the limitations to prepare ether by this method?
What is the action of following on diethyl ether?
PCl5
In the following reaction:
\[\ce{Ether ->[Hot HI] A + B + H2O}\],
If A and B are identical, the ether is ____________.
Which of the following compounds does not contain \[\begin{array}{cc}\backslash\phantom{......}\\\ce{C = O}\\
/\phantom{......}\\\end{array}\] group?
For the preparation of mixed ethers by Williamson synthesis, which of the following combination will give the best yield?
Action of hydrogen iodide on anisole gives ______.
____________ on heating with excess of conc. HI gives two moles of ethyl iodide.
Which of the following statements is INCORRECT for ethers?
A mixed ether on hydrolysis gives ____________.
To prepare ethanol from methyl magnesium bromide, the other reagent required is ____________.
Which of the following compounds does NOT contain \[\begin{array}{cc}\backslash\phantom{.......}\\\ce{C = O}\\
/\phantom{.......}\\\end{array}\] group?
The major product of the reaction between tert-butyl chloride and sodium ethoxide is ______.
Tert-butyl methyl ether on treatment with hydrogen iodide in cold gives ______.
Ethers when dissolved in cold concentrated sulphuric acid forms ______.
Write preparation of diethyl ether.
In Williamson synthesis, if a tertiary alkyl halide is used, then ______.
